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Report number arXiv:2405.19826 ; CERN-EP-2024-144
Title Measurement of the production and elliptic flow of (anti)nuclei in Xe-Xe collisions at sNN = 5.44 TeV
Author(s) ALICE Collaboration  Mostrar todos los 1087 autores
Corporate author(s) The ALICE collaboration
Publication 2024-12-02
Imprint 22 May 2024
Number of pages 23
Note figures at http://alice-publications.web.cern.ch/node/10994
Published in: Phys. Rev. C 110 (2024) 064901
DOI 10.1103/PhysRevC.110.064901
Subject category Nuclear Physics - Experiment ; Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ALICE
Keywords relativistic heavy ion physics ; particle and resonance production ; collective flow ; experimental results
Abstract Measurements of (anti)deuteron and (anti)3He production in the rapidity range |y|< 0.5 as a function of the transverse momentum and event multiplicity in XeXe collisions at a center-of-mass energy per nucleonnucleon pair of sNN = 5.44 TeV are presented. The coalescence parameters B2 and B3 are measured as a function of the transverse momentum per nucleon. The ratios between (anti)deuteron and (anti)3He yields and those of (anti)protons and pions are reported as a function of the mean charged-particle multiplicity density, and compared with two implementations of the statistical hadronization model (SHM) and with coalescence predictions. The elliptic flow of (anti)deuterons is measured for the first time in XeXe collisions and shows features similar to those already observed in PbPb collisions, i.e., the mass ordering at low transverse momentum and the mesonbaryon grouping at intermediate transverse momentum. The production of nuclei is particularly sensitive to the chemical freeze-out temperature of the system created in the collision, which is extracted from a grand-canonical-ensemble-based thermal fit, performed for the first time including light nuclei along with light-flavor hadrons in XeXe collisions. The extracted chemical freeze-out temperature Tchem = (154.2 ± 1.1) MeV in XeXe collisions is similar to that observed in PbPb collisions and close to the crossover temperature predicted by lattice QCD calculations.
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Copyright/License Preprint: © 2024-2025 CERN (License: CC-BY-4.0)
Publication: © 2024-2025 CERN (License: CC BY 4.0)
Submitted by francesco.prino@cern.ch



 


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